Who has been buying COVER Corporation stock?

12 distinct investors have filed 24 disclosed large-shareholding filings in COVER Corporation (5253), most recently on 2026-03-23. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does COVER Corporation have?

COVER Corporation has 24 buy-side and 7 sell-side disclosures on record, covering ¥68.9B ($444.2M) in total reported value, spanning 2023-03-28 to 2026-03-23.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

COVER Corporation 5253

Company

カバー株式会社COVER Corporation

Investors

Buys

Total Value

¥68.9B ($444.2M)

Avg Return

-20.44%

Last Filing

2026-03-23

COVER Corporation (5253) has 24 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥68.9B ($444.2M) in reported transaction value. The earliest filing StockDrifts holds for COVER Corporation is dated 2023-03-28; the most recent is 2026-03-23. Across these filings the average return since disclosure is -20.44%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-05-22	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	3.0M	¥1,760	+7.2%	¥1.2B ($7.5M)
2026-05-15	BUY	unknown	アーカス・インベストメント・リミテッド Arcus Investment Limited Director/Executive Director Edward Cartwright	other	3.3M	¥1,466	+11.5%	¥4.9B ($31.4M)
2026-03-23	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	3.7M	¥1,411	-15.8%	¥241M ($1.6M)
2026-01-09	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	3.9M	¥1,904	-	-
2025-12-22	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	3.9M	¥1,483	-	-
2025-12-05	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	3.9M	¥1,545	+5.8%	¥6.0B ($38.4M)
2025-11-18	SELL	Market Buy	12・ウエスト・キャピタル・マネジメント・エルピー(12 West Capital Management LP) 12 West Capital Management LP	passive	2.2M	¥1,573	-3.9%	¥1.7B ($11.2M)
2025-05-21	SELL	Market Buy	12・ウエスト・キャピタル・マネジメント・エルピー(12 West Capital Management LP) 12 West Capital Management LP	passive	3.3M	¥1,964	+16.8%	¥3.0B ($19.0M)
2025-02-27	BUY	Market Buy	12・ウエスト・キャピタル・マネジメント・エルピー(12 West Capital Management LP) 12 West Capital Management LP	passive	4.6M	¥2,526	-35.3%	¥1.9B ($12.3M)
2025-02-06	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	90.9K	¥3,105	-	¥282M ($1.8M)
2025-02-06	SELL	unknown	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	2.6M	¥3,105	+47.4%	¥2.0B ($13.1M)
2025-02-06	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・エルエルシー Morgan Stanley & Co. LLC	other	217.8K	¥3,105	-	¥676M ($4.4M)
2025-02-04	BUY	Market Buy	12・ウエスト・キャピタル・マネジメント・エルピー(12 West Capital Management LP) 12 West Capital Management LP	passive	3.8M	¥2,938	-44.4%	¥2.0B ($12.9M)
2025-01-30	BUY	Market Buy	12・ウエスト・キャピタル・マネジメント・エルピー(12 West Capital Management LP) 12 West Capital Management LP	passive	3.2M	¥2,826	-42.2%	¥8.9B ($57.7M)
2025-01-21	BUY	unknown	モルガン・スタンレーMUFG証券株式会社 Morgan Stanley MUFG Securities Co., Ltd.	other	3.3M	¥2,788	-41.4%	¥9.2B ($59.3M)
2024-11-07	BUY	unknown	バレー株式会社 Valley Co., Ltd.	activist	3.3M	¥2,214	-	-
2024-11-07	SELL	unknown	谷郷元昭 Motoaki Tanigo	activist	20.8M	¥2,214	+26.2%	¥827M ($5.3M)
2024-11-07	BUY	unknown	谷郷元昭 Motoaki Tanigo	activist	20.8M	¥2,214	-	-
2024-11-07	SELL	unknown	バレー株式会社 Valley Co., Ltd.	activist	3.3M	¥2,214	+26.2%	¥138M ($889K)
2023-06-16	BUY	Market Buy	STRIVE株式会社 STRIVE, Inc.	passive	2.3M	¥2,793	-41.5%	¥65M ($417K)
2023-06-16	BUY	Market Buy	天野雄介 Yusuke Amano	passive	2.3M	¥2,793	-41.5%	¥65M ($417K)
2023-06-16	BUY	Market Buy	堤達生 Tatsuo Tsutsumi	passive	2.3M	¥2,793	-41.5%	¥65M ($417K)
2023-06-16	BUY	Market Buy	STRIVE株式会社、天野雄介、堤達生 STRIVE Co., Ltd., Yusuke Amano, Tatsuo Tsutsumi	unknown	2.3M	¥2,793	-	¥6.6B ($42.3M)
2023-05-16	BUY	Market Buy	STRIVE株式会社 STRIVE, Inc.	passive	3.1M	¥1,794	-8.9%	¥55M ($355K)
2023-05-16	BUY	Market Buy	天野雄介 Yusuke Amano	passive	3.1M	¥1,794	-8.9%	¥55M ($355K)
2023-05-16	BUY	Market Buy	堤達生 Tatsuo Tsutsumi	passive	3.1M	¥1,794	-8.9%	¥55M ($355K)
2023-05-16	BUY	Market Buy	STRIVE株式会社、天野雄介、堤達生 STRIVE Co., Ltd., Yusuke Amano, Tatsuo Tsutsumi	unknown	3.1M	¥1,794	-	¥5.6B ($36.0M)
2023-05-15	BUY	Market Buy	STRIVE株式会社 STRIVE, Inc.	passive	4.0M	¥1,727	-5.4%	¥67M ($435K)
2023-05-15	BUY	Market Buy	天野雄介 Yusuke Amano	passive	4.0M	¥1,727	-5.4%	¥67M ($435K)
2023-05-15	BUY	Market Buy	堤達生 Tatsuo Tsutsumi	passive	4.0M	¥1,727	-5.4%	¥67M ($435K)
2023-05-15	BUY	Market Buy	STRIVE株式会社、天野雄介、堤達生 STRIVE Co., Ltd., Yusuke Amano, Tatsuo Tsutsumi	unknown	4.0M	¥1,727	-	¥6.8B ($44.1M)
2023-05-10	BUY	Market Buy	STRIVE株式会社 STRIVE, Inc.	passive	5.4M	¥1,728	-5.4%	¥92M ($591K)
2023-05-10	BUY	Market Buy	天野雄介 Yusuke Amano	passive	5.4M	¥1,728	-5.4%	¥92M ($591K)
2023-05-10	BUY	Market Buy	STRIVE株式会社、天野雄介、堤達生 STRIVE Co., Ltd., Yusuke Amano, Tatsuo Tsutsumi	unknown	5.4M	¥1,728	-	¥9.3B ($59.9M)
2023-05-10	BUY	Market Buy	堤達生 Tatsuo Tsutsumi	passive	5.4M	¥1,728	-5.4%	¥92M ($591K)
2023-05-01	SELL	unknown	谷郷元昭 Motoaki Tanigo	activist	20.8M	¥1,608	-1.6%	¥3.0B ($19.3M)
2023-05-01	BUY	unknown	谷郷元昭 Motoaki Tanigo	activist	20.8M	¥1,608	-	¥33.5B ($216.2M)
2023-05-01	BUY	unknown	バレー株式会社 Valley Co., Ltd.	activist	3.3M	¥1,608	-	¥5.3B ($34.2M)
2023-05-01	BUY	unknown	バレー株式会社 Valley Co., Ltd.	activist	3.3M	¥1,608	-	-
2023-04-03	BUY	Market Buy	STRIVE株式会社 STRIVE, Inc.	passive	6.6M	¥1,422	+14.9%	¥9.4B ($60.6M)
2023-04-03	BUY	Market Buy	天野雄介 Yusuke Amano	passive	6.6M	¥1,422	+14.9%	¥9.4B ($60.6M)
2023-04-03	BUY	Market Buy	堤達生 Tatsuo Tsutsumi	passive	6.6M	¥1,422	+14.9%	¥9.4B ($60.6M)
2023-04-03	BUY	Market Buy	STRIVE株式会社、天野雄介、堤達生 STRIVE Co., Ltd., Yusuke Amano, Tatsuo Tsutsumi	unknown	6.6M	¥1,422	+14.9%	¥9.4B ($60.6M)
2023-03-28	BUY	subscription	若山理子 Yoshiko Wakayama	activist	6.0M	¥1,470	+11.2%	¥8.8B ($56.6M)
2023-03-28	BUY	unknown	バレー株式会社 Valley Co., Ltd.	activist	3.3M	¥1,470	+11.2%	¥4.9B ($31.3M)
2023-03-28	BUY	unknown	谷郷元昭 Motoaki Tanigo	activist	22.7M	¥1,470	+11.2%	¥33.4B ($215.3M)

Frequently asked questions

Who has been buying COVER Corporation stock?: 12 distinct investors have filed 24 disclosed large-shareholding filings in COVER Corporation (5253), most recently on 2026-03-23. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does COVER Corporation have?: COVER Corporation has 24 buy-side and 7 sell-side disclosures on record, covering ¥68.9B ($444.2M) in total reported value, spanning 2023-03-28 to 2026-03-23.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.